Uthoquapher



.2Sh'eetsSheet 1.-

D. W. SIPRELL. Goal-Mining Machine. No. 225,494.

Patented Mar. 16, 1880.

Wxkues 3 es;

immul um.

N. FErERS, PHOTO-LITHOGRAPHER, WASHINGTON n. C.

1 UNITED STATES PATENT OFFICE.

DARIUS w. SIPRELL, OF CANAL DOVER, OHIO, Assrenoe TO OHIO COAL MINING AUGER COMPANY, OF SAME PLACE.

COAL-MINING MACHINE.

SPECIFICATION forming part of Letters Patent No. 225,494., dated March 16, 1880.

- Application filed December 2, 1879.

To all whom z'tmay concern:

Be it known that I, DARIUS W. SIPRELL,

of Canal Dover, in the county of Tuscarawas" and State of Ohio, have invented a new and Figure 1 is a side elevation. Fig. 2 is a front view, partly in section. Fig. 3 is a section at 3/ y. Fig. 4. is a detached view of the auger. Fig. 5 is a view of the lower half of the threaded ball of the nut. Figs. 6, 7, and 8 are views of a modification.

Like letters of reference indicate like parts in each.

My invention consists of certain improvements in the construction of coal-drilling machines.

To enable others skilled in theart to make and use my invention, I will now describe its construction and mode of operation.

Angers of this class are supported upon an extensiblestandard, which not only sustains the anger, but affords a resistance or brace against which the pressure of the tool in boring.

comes. As heretofore made, these standards have, as far as my observation has extended, been made straight, so that when braced between the roof and floor of the mine and the.

pressure of the boring-tool is brought upon them they have a tendency to bow out in the middle, and consequently to shorten its length and slip from their bearing either above or below. I

To remedy this defect I have made my standard a of curved form, as shown. in use the convex side is turned toward the face of the wall to be drilled, so that the hearing of the drill shall be against that side, and, instead ofloosening the standard, shall, by reducing its curve, lengthen it and cause it to be more tightly braced. The legs a are tubular, and the extension part, placed at the upper end, is formed of a cross-head, b, having curved rods b, which slide inside of the hollow legs a, and the desired adjustment is secured by means of the set-screws and clamps c a, working through the upper ends of the legs a against the rods b. In the cross-head b is ascrew-rod, d, having a spur or point, cl, on the upper end, "which, biting into the roof of the pit, gives the upper bearing of ard. The lower ends of the legs a are fitted with like spurs or points a, to prevent them fromslipping.

The threaded nut c, which sustains and feeds the anger, is supported on the standard a, by the trunnions e'. I v

It is desirable to be able to move the auger stem and bearing up and down on the standard at will. To accomplish this I secure the nut to the standard by means of sleeves f, one on each side, held in place by wedge-shaped keys f", working in counterpart recesses in the sleeves, the large end of the wedge, as shown in the drawings, being downward. When the keys are driven downward the sleeves are loosened and may be moved up and down but when the keys are driven upward the sleeves are locked firmly-in position.

The nut e is what I term a ball-and-socket nut. It is composed ofa shell, 6, and a ball, g. The shell is made in halves, hinged together at one end, so as to be opened when desired, and secured by a pin through holes 6 in the lugs at the other end. It has pivotal side bearings, formed by the trunnions c, passing through the ears f of the sleeves f, and secured therein by nuts. In each half of the shell is one half of the ball 9, each secured in its shell by a stem, g, passing through a large hole in the shell and prevented from escaping therefrom, but permitted to movefreely therein by a button or head, 9.

The two halves are secured together by the closing of the shell 6, and they are prevented from slipping or moving laterally upon each 0 other by tongues on the ends of one fitting in grooves in the ends of the other. This construction permits the auger-stem to have a lateral pivotal movement in the nut 0, so that it may be directed to any point within a lim- 5 ited lateral range over the rock in front. The pivotal bearings 6 permit a straight vertical range of the auger.

the stand- 55 the fact that the vibration of the rod causes the straining of the threads of the sleeve. To obviate this I secure the sleeve to the rod by means of a clamp-clutch, k, which is held in position on the rod by the set-screw k.

The sleeve is provided with a collar, 11, the end of which is provided with sockets t", for the reception of the headed clutch is, so that when the clutch is clamped to the rod and engaged with the sleeve the latter is secured to the rod and must turn with it. I

The sleeve t is loose and slides freely on the rod unless clamped thereto. It has therefore a slight springy action, due to its looseness and method of attachment, which is sufficient to take up or neutralize the effect of the vibration of the rod, and so prevent it from straining the thread.

The auger m is made in sections, preferably of about two feet in length, which are secured together and to the rod h by a box, pin, and key, at n n". It hasa central stem, m, and a single thread, m", which, as the auger always extends to the end of the bore, has a continuous draft upon the borings, carrying them back and out, and keeping the hole clear and unobstructed. This form of anger makes an extremely strong, easy-working, and desirable tool.

The angers known to me heretofore were made either by twisting or by coiling a bar of metal, and they were objectionable, either on account of their springiness or weakness and of their failure to keep the bore clear and unobstructed. These objections are obviated by my improved form, in which the solid-strong stem prevents springiness and weakness, and, in connection with the broad single thread, keeps the bore clear and unobstructed.

The bit 0 is provided with a central point, p, and a spirally bent or curved forked knife, q. The point 19 being in advance of the knife acts as a leading point to it by penetrating the coal and making a drift, so that the effect of the circular cutting action of the knife is to split off fragments of the rock, the fractures running inward toward the central bore.

My experience with plain-edged knives has been that the edge is speedily dulled or turned.

- I avoid this by forking or bifurcating the cutting-edge of the knife, forming two sharp points with intermediate retreating edges.

My experience with this knife is, that the points sink instantly in the coal and are not turned or speedily dulled, and also that they are especially useful in connection with a leading central point, such as 19, because of having a wedge-like action in separating fragments inward toward the hole or drift formed thereby.

The knives p and q are secured in the bit, preferably by holes or mortises, such as 0.

The operation of myimproved device is as follows: The standard is set up and braced by means of the screw 01, with the spurred feet planted in the floor of the mine and the upper end in the roof or wall. The first section of auger, having the bit, is fastened to the stem, and the latter placed in the nut. The boring then begins, and continues until the first section of auger is buried in the rock. The nut is then opened, and the stem detached from the auger and set back in the nut. Another section of auger is fastened to the first section and to the stem, and the boring continued until finished, as many sections being advanced to the auger as may be necessary.

It is evident that the exact construction and form of many of the parts may be changed without departure from my invention. For instance. the curved form of standard is as useful with a solidas with an extensible standard, and I design to apply it thereto. The extension end I) may have tubular legs sliding over the legs of the standard, which may be solid. The forms of the pivotal bearings e", the sleeves f, the keys f, and of many other parts of my machine may be varied by the skilled mechanic.

Some parts of these machines wear on speedily, especially the bit and the nut. By my construction these parts can be easily and cheaply replaced. In the case of the nut, the ballis the only part that will wear rapidly, and it can be taken out and replaced by a new one without the loss or injury of the shell and trunnions.

A modified construction is shown in Fig. 6, which is especially adapted for use in boring parallel to the face of the rock, in which position the crank cannot be used on the end of the rod, as it strikes against the face of the rock.

It will be noticed that there are here two cranks, 1*, one on each side, and that they are connected by miter-wheels r with the wheel t on the collar t, which rests in a bed, t, in the frame a, and is there held by the cap and latch 17. The bore of the collar 26 is polygonal in shape, and the purpose of this is to cause it to turn the sleeve/u, which at one end is of corresponding external form. At the other end the sleeve 11 is threaded for the purpose of feeding the anger, the stem of which is inserted into it, and fastened there by the setscrew 12. The threaded nut w is at the forward end of the frame a, and is in two parts hinged together, the open ends being closed by a pin, w. This apparatus is mounted on the standard by'the trunnions m, to which they are hooked at m.

It is not necessary to have both of the cranks 3. The auger-stern and loosethreaded sleeve, 1 5 in combination with the clutch for securing the sleeve to the stern, substantially as and for the purposes set forth.

4. A mining-auger bit having a central leading-point and an outer bifurcated knife 20 or cutter, substantially as and for the purposes set forth.

In testimony whereof I, the said DARIUS W. SIPRELL, have hereunto set my hand.

DARIUS W. SIPBELL.

Witnesses:

R. H. WHITTLESEY, T. B. KERR. 

